Amparo Ramos

Universitat de València

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Alfonso Sopeña

Instituto de Geociencias

Marta Pérez‐Arlucea

Universidade de Vigo

Jeanne Doubinger

Laboratoire d’HYdrologie et de GEochimie

Yolanda Sánchez Moya

Universidad Complutense de Madrid

Alfredo Arché

Instituto de Geociencias

Peter Turner

The Royal Melbourne Hospital

Lourdes Rey

Universidade de Vigo

Carmen Virgili

F. Vilas

Universidade de Vigo

MÃ

Miguel Ãngel Nombela

Universidade de Vigo

Cooperative Institutions

Universidad Complutense de Madrid

Consejo Superior de Investigaciones Científicas

Instituto de Geociencias

Universidade de Vigo

Museo Nacional de Ciencias Naturales

Instituto Geológico y Minero de España

Universitat de València

University of Castilla-La Mancha

Instituto Español de Oceanografía

Université de Strasbourg

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Gravel Bars in Low‐Sinuosity Streams (Permian and Triassic, Central Spain)

Amparo Ramos Alfonso Sopeña

The Buntsandstein sequence of the central area of Spain ranges from a variety of fluvial facies, low in the succession, to tidal mudstones and carbonates in the youngest and most eastern areas. This paper is restricted to the conglomerates in the lowest part of the fluvial sequence. These were deposited in bar and channel systems dominated by gravelly, low-sinuosity braided streams. Their distribution reflects both the pre-existing topography and synsedimentary tectonic movements. Six main facies have been distinguished (in order of decreasing abundance): sheets of massive conglomerates, channel-fill conglomerates, coarse–medium sandstones, lateral accretion conglomerates. tabular cross-stratified conglomerates, fine-grained sediments. Sheets of gravels, formed as longitudinal bars, were by far the major feature of sediment accumulation. Units of lateral accretion, if not very frequent, are quite important as they probably represent modifications of bars during waning stage. Two big cycles may be seen in these conglomerates. They correspond to different physiographic models. The lower cycle was mainly formed by smaller channels and bars than was the upper cycle. The lower cycle is mainly formed by channel deposits, whilst in contrast, the upper cycle is mainly made up of longitudinal bars. The change in sedimentation may be due to tectonic movements that occurred in the basin during Buntsandstein deposition.

Sinuosity

Conglomerate

10.1002/9781444303773.ch24

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Citations (141)

Women’s Promotion to Management and Unfairness Perceptions—A Challenge to the Social Sustainability of the Organizations and Beyond

Sustainability (2022)

Amparo Ramos Felisa Latorre Inés Tomás José Ramos

Inequality between women and men in top management positions is still a current reality where women are underrepresented. Gender discrimination against women in managerial positions violates the Sustainable Development Goal of gender equality. Gender discrimination affects women but also has negative consequences for employee output. Our aim is analyzing how the role of gender moderates the relationship between gender barriers to managerial positions and performance, mediated by organizational justice and commitment, and whether this relationship is stronger in women than in men. This study was carried out with 1278 employees (45.2% women and 54.8% men) of a Spanish financial group consisting of three different organizations. We performed a moderated mediation path analysis with Mplus. Results show that some gender barriers are associated with lower perceptions of organizational justice, which in turn are associated with lower organizational commitment, thus reducing performance. Moreover, this relationship is significant in men and women for work–family balance and barriers to accessing influential networks, but for unfair HR policies and practices, it is only significant in women. Removing gender barriers and unfairness perceptions is the goal that will contribute to organizational sustainability from the gender perspective.

Promotion (chess)

Moderated mediation

Gender Mainstreaming

Gender Diversity

10.3390/su14020788

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Citations (11)

Palaeomagnetism of Permo-Triassic rocks in the Iberian Cordillera, Spain: acquisition of Secondary and characteristic remanence

Journal of the Geological Society (1989)

Peter Turner Amanda R. Turner Amparo Ramos Alfonso Sopeña

Magnetostratigraphy is widely used as a tool for stratigraphical correlation but there are problems in its application to rocks which have suffered complex diagenesis, particularly sandy, continental red beds. In such cases the complete magnetic record should be studied in relation to its depositional, diagenetic and structural history. To this end a detailed palaeomagnetic study has been made of Permian and Triassic rocks in the northern Iberian Cordillera, Spain. Four stratigraphical units comprising the Autunian, 'Saxonian', Buntsandstein and Muschelkalk have been studied in a single section near Molina de Aragon which is well-documented sedimentologically. Autunian rocks have a characteristic remanence which is exclusively reversed and corresponds to the Kiaman Interval of Lower Permian age. A pole position (49 N, 167 W) is consistent with previous studies which indicate the rotation of Iberia in post-Triassic times relative to the stable European plate. The Saxonian facies show complex, multicomponent magnetizations; no polarity zonation can be resolved but individual components were acquired prior to the rotation of Iberia. The Buntsandstein is remarkable in that much of it is completely remagnetized in a direction similar to the present local geomagnetic direction. This secondary remanence is carried by fine grained hematite which has been formed as a result of carbonate dissolution and other diagenetic reactions. Initially, these iron oxides were probably superparamagnetic and remanence was only blocked-in by structural inversion of the Iberian Cordillera in Tertiary times and after rotation of the Iberian plate. Some of the primary remanence is preserved in some fine grained lithologies of the Buntsandstein, indicating that normal and reversed zones of magnetization were originally present. The magnetization of the Muschelkalk carbonates is also complex; secondary components similar to those of the Buntsandstein are present but there is evidence that primary components were mainly normal during Karnian times.

Red beds

Trias

10.1144/gsjgs.146.1.0061

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Citations (29)

Extensional tectonics in the central Iberian Peninsula during the Variscan to Alpine transition

Tectonophysics (1994)

Miguel Doblas José Antonio López-Ruiz Roberto Oyarzun Vicente Mahecha Yolanda Sánchez Moya

Plutonism

Devonian

Extensional tectonics

10.1016/0040-1951(94)90051-5

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Citations (52)

Evolving fluvial architecture during a marine transgression: Upper Buntsandstein, Triassic, central Spain

Sedimentary Geology (1992)

Araceli Muñóz Amparo Ramos Yolanda Sánchez Moya Alfonso Sopeña

Marine transgression

Transgressive

Ephemeral key

Progradation

Alluvial fan

Sinuosity

10.1016/0037-0738(92)90096-a

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Citations (41)

Transition from alluvial to coastal deposits (Permian–Triassic) on the Island of Mallorca, western Mediterranean

Geological Magazine (1995)

Amparo Ramos

Abstract Non-marine redbeds (Permian and Triassic) in the island of Mallorca consist of a 0.4 km-thick alluvial succession that passes upwards into siliciclastic–carbonate coastal deposits. Tectonics and sealevel changes have been the main influences in their evolution. Low in this succession (the ‘Areniscas y lutitas de Port des Canonge’ unit) sandstone sheets with lateral accretion surfaces (macroscale inclined strata) and mudstones with frequent exposure structures are interpreted as the products of a sinuous alluvial system and floodplain. Climatic fluctuations are considered to be responsible for some significant up-section changes in the evolution of the alluvial deposits. Low-angle or horizontally stratified sandy units, interpreted as the result of flash floods, alternate upwards with point-bar deposits in the ‘Areniscas de Asá’. The hydrological response to minor climatic changes was evidently nearly instantaneous due to the lack of significant vegetation cover. During accumulation of mudstones and sandstones of the overlying ‘Lutitas y Areniscas de Son Serralta’ unit, the interpreted environment of deposition changed from a distal braidplain, mainly constructed by superposition of sandy bedforms with straight or linguoid crestlines in low sinuosity river channels, into a coastal plain with evidence of both continental and marine influences. The overlying carbonate platform (Muschelkalk) marks the development of a more homogeneous marine environment resulting from the Tethyan transgressive event that affected the whole peri-Mediterranean realm during the Anisian (middle Triassic).

Alluvial fan

Siliciclastic

Red beds

Progradation

Marine transgression

Alluvial plain

10.1017/s001675680002149x

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Citations (18)

Caracterización de las unidades litoestrafigráficas del Triásico en el subsuelo del tercio noroccidental de la Cordillera Ibérica y áreas adyacentes

Journal of iberian geology: an international publication of earth sciences (1995)

Amparo Ramos Y. Sánchez-moya A. Sopeña Adriana Lorena Salazar Muñoz

En este trabajo se realiza un estudio de los sedimentos permicos y triasicos que se localizan principalmente en el subsuelo de la Cuenca de Almazan, borde E de la Cuenca dcl Duero y borde NW de la Cuenca del Ebro, mediante el analisis detallado de los sondeos y lineas sismicas que existen en estas areas. Esto ha permitido establecer una serie de correlaciones con los materiales equivalentes que afloran en superficie en areas proximas de ambas ramas de la Cordillera Iberica. Las unidades litoestratigraficas establecidas en los afloramientos de la Cordillera Iberica, por autores anteriores, sir ven de referencia para el analisis e interpretacion de los sondeos. Han podido ser caracterizadas en profundidad un total de 14 unidades de las cuales 1 corresponde al Permico inferior, 9 corresponden a materiales en facies Buntsandstein y 4 a materiales en facies Muschelkalk. Estas unidades presentan una distribucion irregular, habiendose establecido tres sectores en el area estudiada en funcion de sus caracteristicas litologicas.

10.5209/rev_cgib.1995.v19.2562

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Citations (4)

The Corrubedo beach-lagoon complex, Galicia, Spain: Dynamics, sediments and recent evolution of a mesotidal coastal embayment

Marine Geology (1991)

F. Vilas Alfonso Sopeña Lourdes Rey Amparo Ramos Miguel Ãngel Nombela

10.1016/0025-3227(91)90128-q

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Citations (18)

Problemas de la cronoestratigrafía del Trías en España.

Journal of Iberian Geology (1977)

Carmen Virgili Amparo Ramos Andrés Sopeña S. Hernando Costa

10.5209/rev_cgib.1977.v4.2880

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Citations (16)

Palynologie du Permien et du Trias dans le centre de la Péninsule Ibérique / Permian and Triassic Palynology in the Middle part of the Iberian Peninsula

Sciences Géologiques Bulletin (1995)

Alfonso Sopeña Jeanne Doubinger Amparo Ramos Marta Pérez‐Arlucea

Palynological data from the carbonatic and siliciclastic sediments in the Central System and western Iberian Ranges has allowed us to make some age-dating for most of the sediments unconformably overlying the lower Paleozoic metamorphic basement. Twelve palynological assemblages have been identified. They range in age from early Permian (Autunian) to late Triassic (Carnian). Early Permian consists mainly of grey-black sediments filling small isolated half graben basins. Saxonian fades unconformably overly Autunian or early Paleozoic rocks. Paleontological data for Saxonian facies point to a middle to late Permian age. The overlying lower Buntsandstein is also late Permian (Thuringian) in age in some areas in south-western Iberian Range. The overlying Triassic rocks (upper Buntsandstein, Muschelkalk and Keuper) contain several palynological assemblages : Anisian, Anisian-Ladinian, Ladinian s.l., late Ladinian and Kamian. Some ages have been also compared with ammonoids and conodonts dating in the same areas.

Ladinian

10.3406/sgeol.1995.1926

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Citations (11)